<span style=" font-size:10pt;font-family:sans-serif">Thank you, Ken.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">I will check the
pending SLS resolution for 131.2 BB.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Concerning the
230.2-G-1, our CCSDS website points it to a no-longer-existing NGU WG.
I remember Greg being involved in this as well.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Thus, I guess
we need concurrence at SLS Area for its retirement.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Kind regards,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Ignacio</span>
<br><img src=cid:_1_0ED012F80ED00EEC00302163C1258856 style="border:0px solid;"><span style=" font-size:12pt"> </span>
<br>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa"><b>Ignacio
Aguilar Sánchez</b></span>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">Communication
Systems Engineer</span>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">Electrical
Engineering Department</span>
<br>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">European
Space Research and Technology Centre<br>
Keplerlaan 1, PO Box 299, 2200 AG Noordwijk, The Netherlands</span>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">Tel.
(31) 71 565 5695</span>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">Fax
(31) 71 565 5418</span>
<br><span style=" font-size:9pt;color:#4f4f4f;font-family:NotesEsa">Email:
ignacio.aguilar.sanchez@esa.int<br>
</span><a href=www.esa.int><span style=" font-size:9pt;color:blue;font-family:NotesEsa">www.esa.int</span></a>
<br>
<br>
<br>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">"Andrews,
Kenneth S (US 332B)" <kenneth.s.andrews@jpl.nasa.gov></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"Andrea.Modenini---
via SLS-CC" <sls-cc@mailman.ccsds.org>, "Ignacio Aguilar
Sanchez/estec/ESA" <Ignacio.Aguilar.Sanchez@esa.int></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">02/06/2022
17:32</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">A
few C&S notes inspired by the SLS Plenary</span>
<br>
<hr noshade>
<br>
<br>
<br><span style=" font-size:12pt">Ignacio and Andrea, </span>
<br>
<br><span style=" font-size:12pt">Here are a few comments in response to
discussion during the SLS Plenary.</span>
<br>
<br><span style=" font-size:12pt">* A list of all projects is available
in the CWE Area here:</span>
<br><a href=https://cwe.ccsds.org/fm/Lists/Projects/AllOpenChartersWithAllProjects.aspx><span style=" font-size:12pt;color:blue"><u>https://cwe.ccsds.org/fm/Lists/Projects/AllOpenChartersWithAllProjects.aspx</u></span></a>
<br><span style=" font-size:12pt">One can scroll down to 5.02, for example,
to see an historical list of all projects completed by the Coding and Synchronization
Working Group. Given this, I don’t see a good reason to duplicate
the list in our charter.</span>
<br>
<br><span style=" font-size:12pt">* The Optical Communications Working
Group charter is available here:</span>
<br><a href=https://cwe.ccsds.org/fm/Lists/Charters/sls.aspx><span style=" font-size:12pt;color:blue"><u>https://cwe.ccsds.org/fm/Lists/Charters/sls.aspx</u></span></a>
<br><span style=" font-size:12pt">It does include coding for optical links,
and in fact, that working group has been standardizing codes for optical
links. Hence, I think it makes sense to delete it from the Coding
and Synchronization charter.</span>
<br>
<br><span style=" font-size:12pt">* Andrea’s slides mention that
for the 131.2 Blue Book (Flexible Advanced Coding and Modulation, i.e.
SCCC), a C&S WG resolution for publication for publication was issued
in Fall of 2021. I found an email message dated 11 February, 2022,
but I don’t know that anything has happened since then. I think
the next step would be for Ignacio to issue an SLS resolution, so if you
could both look back at that and confirm the status, I’d appreciate it.</span>
<br>
<br><span style=" font-size:12pt">* For the five-year review, the
only C&S document that comes to mind is 230.2-G-1, “Next Generation
Uplink”, published in 2014. That book provided a roadmap for updating
our ground-to-space communications link standards, and we have largely
completed that over the past eight years. We added short-blocklength
LDPC codes to the TC Blue Book (231.0-B) in 2017 (updated again in 2021),
explained those codes in the TC Green Book (230.1-G-3) in 2021, and permitted
the use of the AOS protocol on forward links in the TM Coding Blue Book
(131.0-B-4) and DVB-S2 Blue Book (131.3-B-2) in 2022, and have a resolution
pending to do the same with the SCCC Blue Book (131.2-B). Hence,
I think we can now retire that Next Generation Uplink Green Book.</span>
<br>
<br><span style=" font-size:12pt">Thanks,</span>
<br>
<br><span style=" font-size:12pt">-Ken</span>
<br>
<br>
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